Managing Environment Variables for Deployments

#!/bin/bash

# This script is intended to be sourced, not executed directly.
# Example: source ./env_config.sh

# --- Common Configuration (default values) ---
export APP_ENV="development"
export DEBUG_MODE="true"
export DATABASE_HOST="localhost"
export DATABASE_PORT="5432"
export API_BASE_URL="http://localhost:3000/api"

# --- Environment-Specific Overrides ---

# Check if a specific environment is requested via an argument
if [ "$1" = "production" ]; then
  echo "Loading production environment configuration..."
  export APP_ENV="production"
  export DEBUG_MODE="false"
  export DATABASE_HOST="prod_db.mycompany.com"
  export DATABASE_PORT="5432"
  export API_BASE_URL="https://api.mycompany.com/v1"
  # Potentially load from a .env.production file
  # if [ -f ".env.production" ]; then
  #   source .env.production
  # fi
elif [ "$1" = "staging" ]; then
  echo "Loading staging environment configuration..."
  export APP_ENV="staging"
  export DEBUG_MODE="true"
  export DATABASE_HOST="staging_db.mycompany.com"
  export DATABASE_PORT="5432"
  export API_BASE_URL="https://staging-api.mycompany.com/v1"
  # if [ -f ".env.staging" ]; then
  #   source .env.staging
  # fi
else
  echo "No specific environment provided or recognized. Loading development defaults."
fi

# Optional: Display loaded variables (for debugging)
echo "
--- Current Environment Variables ---"
env | grep -E '^(APP_ENV|DEBUG_MODE|DATABASE_HOST|DATABASE_PORT|API_BASE_URL)'
echo "-------------------------------------"